Method of verifying defect management area information of disc and test apparatus for performing the same

ABSTRACT

A method of verifying that defect management area (DMA) information is generated or updated normally when a disc recording and reproducing apparatus performs reinitialization with secondary defect list (SDL) conversion without certification, and a test apparatus for performing the method. The method includes performing reinitialization without certification in the recording and reproducing apparatus using a test disc with test reference information and generating test information from the defect management information which is generated after the reinitialization, and comparing reference information expected from the test reference information with the test information and providing the result of verification of the test information. Accordingly, a user can test the DMA generation or updating function of a given disc recording and reproducing apparatus within a short period of time, and the cost for producing and providing the test disc can be saved.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korean Application No. 00-18504,filed Apr. 8, 2000, in the Korean Patent Office and U.S. ProvisionalApplication No. 60/195,469, filed Apr. 10, 2000, the disclosures ofwhich are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus which can recordinformation on and reproduce information from a recording andreproducing disc, and more particularly, to a method of verifying that adisc recording and reproducing apparatus normally generates or updatesdefect management area (DMA) information of a disc, and a test apparatusfor performing the same.

2. Description of the Related Art

A recording and reproducing disc is an optical disc, which informationis recorded on and reproduced from using light such a laser beam, forexample, a digital versatile disc random access memory (DVD-RAM). ADVD-RAM is a rewritable disc. According to “DVD Specifications forRewritable Disc Part1 Physical Specifications Version 2.0,” DVD-RAMincludes four DMAs, i.e., DMA1, DMA2, DMA3 and DMA4, on each sidethereof for managing the defects thereon.

As shown in FIG. 1, DMA1 and DMA2 are located in a lead-in area near theinner diameter of a disc, and DMA3 and DMA4 are located in a lead-outarea near the outer diameter of the disc. Each DMA is followed by areserved sector.

A disc definition structure (DDS), a primary defect list (PDL) and asecondary defect list (SDL) are stored in the DMA. A DDS includesinformation on the format structure of a disc, for example, a disccertification flag, a DDS/PDL update counter and a start logical sectornumber of each zone. A PDL includes information on all defective sectorsdetected on the disc during initialization of the disc. An SDL includesinformation on the sector number of each first sector in defectiveblocks (error-correction code (ECC) blocks) occurring while the disc isin use, information on the sector number of each first sector in spareblocks used to replace defective blocks and information on a spare area.

Some information included in the DMA can be immediately read and used.On the other hand, the DMA includes information which varies with thepositions and the number of defects on a disc. In addition, someinformation, for example, the position information of the start sectornumber of each zone or the position information of a logical sectornumber 0, can be obtained by performing an algorithm based on defectinformation registered in the DMA.

Four DMAs exist on each side of a disc to prevent erroneous defectmanagement due to errors in the DMA information. Since such DMAinformation is closely related to a physical data sector, a recordingmedium such as a movable optical disc may not be compatible with twodifferent disc recording and reproducing apparatuses when the DMAinformation is incorrectly written or read.

This is because, when the recording and reproducing architecture of adisc recording and reproducing apparatus (for example, a DVD-RAMrecording and reproducing apparatus) is divided into a file systemlayer, a host interface layer for interfacing a host computer with therecording and reproducing apparatus, a physical disc recording andreproducing apparatus (or disc drive) layer for recording andreproducing physical signals, and a recording medium layer, writing andreading of DMA information is performed in the physical disc recordingand reproducing apparatus layer and the layers therebelow.

In an actual file system, user information to be recorded or reproducedis transmitted to a disc recording and reproducing apparatus based ononly a logical sector number, and the disc recording and reproducingapparatus converts the logical sector number into a physical sectornumber to record or reproduce the user information. In this case, DMAinformation is used. Accordingly, when the DMA information haserroneously been read or written in a given disc recording andreproducing apparatus, data cannot be correctly read or written inanother recording and reproducing apparatus.

Accordingly, a method of verifying that a disc recording and reproducingapparatus correctly reads DMA information recorded on a disc andcorrectly records DMA information on the disc for generation or updateof DMA information is desired.

SUMMARY OF THE INVENTION

To solve the above problem, a first object of the present invention isto provide a method of verifying that defect management area (DMA)information is generated or updated normally when a disc recording andreproducing apparatus performs reinitialization with secondary defectlist (SDL) conversion without certification.

A second object of the present invention is to provide a method ofverifying that the DMA information of a disc, which is generated using ablank disc and a test reference DMA mirror file configured such thatevery kind of defect information is included in a primary defect list,is generated or updated normally when a disc recording and reproducingapparatus performs reinitialization with SDL conversion withoutcertification.

A third object of the present invention is to provide a test apparatusfor verifying that DMA information is generated or updated normally whena disc recording and reproducing apparatus performs reinitializationwith SDL conversion without certification.

Additional objects and advantages of the invention will be set forth inpart in the description which follows and, in part, will be obvious fromthe description, or may be learned by practice of the invention.

To achieve the above and other objects of the present invention, thereis provided a method of verifying the DMA information generation orupdating function of a recording and reproducing apparatus, whichrecords information on or reproduces information from a disc with DMAinformation. The method includes performing reinitialization withoutcertification in the recording and reproducing apparatus using a testdisc with test reference information and generating test informationfrom the defect management information which is generated after thereinitialization, and comparing reference information expected from thetest reference information with the test information and providing theresult of verification of the test information.

To achieve the above and other objects of the invention, there is alsoprovided an apparatus for testing the DMA information generation orupdating function of a recording and reproducing apparatus which recordsinformation on or reproduces information from a disc with DMAinformation. The apparatus includes a test disc with test referenceinformation; a reference drive generating test information from DMA ofthe test disc after the recording and reproducing apparatus performsreinitialization without certification using the test disc; and averifier comparing reference information, which is expected from thetest reference information, with the test information and providing theresult of verifying the test information.

BRIEF DESCRIPTION OF THE DRAWINGS

The above objects and advantages of the present invention will becomemore apparent by describing in detail preferred embodiments thereof withreference to the attached drawings in which:

FIG. 1 shows the schematic configuration of a rewritable disc;

FIG. 2 is a block diagram showing the functioning of a test apparatusaccording to the present invention;

FIG. 3 shows an example of the defect structure of a C−2 disc;

FIGS. 4A through 4D are examples of detailed check lists forverification performed by the verifier of FIG. 2;

FIG. 5 is a block diagram showing the relation between a primary defectlist (PDL) and a secondary defect list (SDL) in the defect managementarea (DMA) of a C−2 disc before reinitialization and the PDL and the SDLin the DMA of the C−2 disc after the reinitialization, respectively;

FIG. 6 is a flowchart of a verification method according to the presentinvention; and

FIG. 7 is a block diagram of the drive to be tested shown in FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now made in detail to the present preferred embodimentsof the present invention, examples of which are illustrated in theaccompanying drawings, wherein like reference numerals refer to the likeelements throughout. The embodiments are described below in order toexplain the present invention by referring to the figures.

Referring to FIG. 2, a test apparatus includes a C−1 disc 201, a defectmanagement area (DMA) mirror file provider 203, a reference drive 205, aC−2 disc 207, a drive to be tested 209, a C−2′ disc 211, a C−2′ disc DMAmirror file 213 and a verifier 215.

The C−1 disc 201 is a test disc which is made to have intentionalphysical defects for the purpose of testing a disc drive which canrecord information on or reproduce information from a rewritable discsuch as a digital versatile disc random access memory (DVD-RAM), and issubstantially a blank disc on which no information is recorded. As longas no “information” is recorded and only intentional “defects” arepresent on the C−1 disc 201, the C+1 disc 201 may be regarded as blank.Accordingly, the physical defects on the C−1 disc 201 are used as knowninformation when the disc drive is tested. In addition, the C−1 disc 201is designed to satisfy conditions of a phase change recording DVD-RAMwhich has a capacity of 4.7 gigabytes (GB) prescribed in the “DVDSpecifications for Rewritable Disc Version 2.0.”

The DMA mirror file provider 203 provides a DMA mirror file which istest reference information including disc definition structure (DDS)information, primary defect list (PDL) information and secondary defectlist (SDL) information, as shown in FIG. 1, and satisfying a conditionthat a supplementary spare area (SSA) is not full.

Particularly, the DMA mirror file provider 203 provides a test referenceDMA mirror file which is configured such that all kinds of defects areincluded in the PDL. In other words, the test reference DMA mirror filehas the PDL, which includes a P-list with information on defectivesectors defined by a disc manufacturer, a G1-list with information ondefective sectors detected during certification of a disc, and a G2-listwith information on defective sectors which are shifted to the SDLwithout certification.

To increase the effect of a test, a test reference DMA mirror file,which includes information on defects located in particular positionswhich have the highest possibility of occurrence of errors, is providedwhen the drive to be tested 209 performs reinitialization. In otherwords, to satisfy all cases of an algorithm which are proposed by “DVDSpecifications for Rewritable Disc Part1 Physical Specifications Version2.0,” the test reference DMA mirror file is configured to includeinformation on defects concentrated around a physical sector locatedwhere a first logical sector is supposed to be located, as shown in FIG.3.

Also, the test reference DMA mirror file is characterized by that thefirst and last sectors of each zone are treated as erroneous ones andthat defective sectors are set such that a total of available sectors ineach zone is not a multiple of 16. A mirror file has the same content asan actual file, but is located at a position different from the physicalposition of the actual file.

The DMA mirror file provider 203 also provides the test reference DMAmirror file, in which the number of entries in the SDL exceeds the totalnumber of available entries in the PDL, to consider an overflow statewhen the disc to be tested 209 performs reinitialization with SDLconversion without certification on a disc.

The reference drive 205 is a modified test drive for testing anapparatus capable of recording information on and reproducinginformation from a disc. When the C−1 disc 201 is loaded into thereference drive 205 and the test reference DMA mirror file is providedfrom the DMA mirror file provider 203, the reference drive 205 recordsthe test reference DMA mirror file on the C−1 disc 201 to generate theC−2 disc 207. The test reference DMA mirror file is recorded onto theC−1 disc 201 regardless of physical defects on the C−1 disc 201.Accordingly, the C−2 disc 207 includes the physical defects of the C−1disc 201 and test reference DMA mirror file information in which allkinds of defect information are included in the PDL regardless of thephysical defects. Like the C−1 disc 201, the C−2 disc 207 satisfies theconditions of a phase change recording DVD-RAM which has a capacity of4.7 GB. The DMA information recorded on the C−2 disc 207 is what isknown to the user.

When the C−2′ disc 211, which is reinitialized with SDL conversionwithout certification, is loaded into the reference drive 205, thereference drive 205 immediately reads DMA information recorded on theC−2′ disc 211 and outputs a read C−2′ disc DMA mirror file 213 based onthe DMA information, as test information. The test information may bepart of the C−2′ disc DMA mirror file 213. For example, the part may bethe information corresponding to that shown in FIG. 4A.

The drive to be tested 209 is a disc recording and reproducing apparatuswhich can record information on and reproduce information from arewritable disc. When the C−2 disc 207 is loaded into the drive to betested 209, the drive to be tested 209 performs reinitialization withSDL conversion without certification, thereby generating or updating thetest reference DMA information contained in the C−2 disc 207.

In other words, when the drive to be tested 209 reinitializes the C−2disc 207 with registering SDL entries in the G2-list of PDL withoutcertification, the entries in the SDL of the C−2 disc 207 are registeredin the PDL in the form of a G2 entry type. Consequently, the PDL of theDMA on the C−2′ disc 211 which is generated by the drive to be tested209 includes the entries in the SDL of the C−2 disc 207. The C−2′ disc211 including the generated or updated DMA information is loaded intothe reference drive 205, and thus test information is output asdescribed above.

The test information from the reference drive 205 is provided to theverifier 215. In providing the test information, the reference drive 205may immediately provide the test information to the verifier 215.

The verifier 215 verifies the C−2′ disc DMA mirror file 213 usingexpected reference information (expected values) on DMA which isobtained when the drive to be tested 209 performs normally thereinitialization with SDL conversion without certification on the C−2disc 207. The expected reference information may be set by the verifier215 based on the test reference DMA mirror file provided from the DMAmirror file provider 203 and the physical defect information containedin the previously provided C−1 disc 201. Alternatively, as shown inFIGS. 4A through 4D, DMA information tables may be previously preparedand used.

FIG. 4A shows a check list which the verifier 215 can include for DMAverification. The check items of the list include an error condition ofDMA1 through DMA4, DDS/PDL update counters in DDS1 through DDS4 and inSDL1 through SDL4, SDL update counters in SDL1 through SDL4, andcontents of DMA1 through DMA4.

The error condition of a DMA item is for checking whether errors existin DMAs, two of which are located in a lead-in area and two of which arelocated in a lead-out area. Uncorrectable errors must not exist in anyof the four DMAs, DMA1, DMA2, DMA3 and DMA4. If any uncorrectable erroris detected in any one of the DMAs, the test result is output to informthe user that the drive to be tested 209 failed in generating orupdating the DMA of the C−2 disc 207. When the generation or updating ofthe DMA ends in failure, the user needs to retry the test from thebeginning using another test disc.

To verify the DDS/PDL and SDL update counter item upon reinitialization,the values “M+k,” which indicate the values of DDS/PDL update countersin four DDSs, i.e., DDS1, DDS2, DDS3 and DDS4, and in four SDLs, i.e.,SDL1, SDL2, SDL3 and SDL4, are checked to find whether the value “M” isa previous value and whether the value “k” is “1,” because each DDS/PDLupdate counter value is increased by one when the DDS/PDL is updated orrewritten. The “previous value” means the value of “M” before the driveto be tested 209 performs the reinitialization with SDL conversionwithout certification. It is also checked whether the values of theeight DDS/PDL update counters in the four DMAs, i.e., DMA1, DMA2, DMA3and DMA4, are the same.

The values “N+k,” which indicate the values of SDL update counters infour SDLs, i.e., SDL1, SDL2, SDL3 and SDL4, are checked to find whetherthe value “N” is a previous value and whether the value “k” is “1,”because each SDL update counter value is increased by one when the SDLis updated or rewritten. The “previous value of “N” before the drive tobe tested 209 performs the reinitialization with SDL conversion withoutcertification. It is also checked whether the values of the four SDLupdate counters are the same.

In addition, it is checked whether the contents of the four DMAs, i.e.,DMA1, DMA2, DMA3 and DMA4, are the same.

FIG. 4B shows a check list which the verifier 215 can include forverification of the DDS. The check items of the list include a DDSidentifier, a disc certification flag, a DDS/PDL update counter, anumber of groups, a number of zones, a location of a primary spare area,a location of a first logical sector number (LSN0), a start LSN for eachzone, etc.

It is verified that the DDS identifier is “0A0Ah.” It is checked whetherthe value of the bit position b7, which indicates in-progress/notin-progress, in the one byte of the disc certification flag, is “0b.” Ifthe value of the bit position b7 is “0b,” this indicates that formattingis completed. If the value of the bit position b7 is “1b,” thisindicates that formatting is in progress. Accordingly, when the value ofthe bit position b7 is “1b,” the verifier 215 determines that formattinghas failed. In addition, it is checked whether reserved bit positions b6through b2 in the disc certification flag are all “0b,” and it ischecked whether the value of a bit position b1 indicating a usercertification flag is “1b.” It is also checked whether the value of abit position b0 indicating a disc manufacturer certification flag is“1b.”

To verify the corresponding DDS/PDL update counter, it is checkedwhether a value M indicating the DDS/PDL update counter value is aprevious value, and whether a value k indicating the increment of theDDS/PDL update counter representing a difference in the DDS/PDL updatecounter “M” before and after a test is “1.” It is also checked whetherthe value of the number of groups is “0001h” indicating that the numberof groups is 1, and whether the value of the number of zones is “0023h,”indicating that the number of zones is 35.

Moreover, it is checked whether the first sector number of a primaryspare area is “031000h,” and whether the last sector number of theprimary spare area is “0341FFh.”It is checked whether the location ofLSN0 and the start LSN for every zone, that is, the start LSNs of thesecond zone, Zone1, through the 35th, zone Zone34, are determined basedon the number of defects registered in the PDL. The defects registeredin the PDL cover the physical defects on the C−1 disc 201 and defectsregistered in the PDL of the test reference DMA mirror file providedfrom the DMA mirror file provider 203.

It is checked whether the remaining reserved areas (byte positions 396to 2047) in the DDS structure are all “00h.”

As shown in FIG. 4C, check items for verifying the PDL structure includea PDL identifier, a number of entries in the PDL, an integrity of PDLentries and an un-used area.

It is checked whether the PDL identifier is “0001h.” The number ofentries in the PDL is the sum of the number of physical defects on theC−1 disc 201 and the number of defects registered in the PDL of the testreference DMA mirror file provided from the DMA mirror file provider203. For verification of the integrity of each PDL entry, a type ofentry and a defective sector number are checked. It is checked whetherthe PDL entry type has “00b” indicating a known P-list existing on theC−2 disc 207, “10b” indicating a G1-list of defective sectors detectedduring user certification, and “11b” indicating the G2-list generateddue to the SDL conversion. Also, it is checked whether the defectivesector numbers in the PDL are written in ascending order.

When the type of entry in the PDL is checked, it is checked whether allentry types of the P-list, G1-list and G2-list exist because, as shownin FIG. 5, a P_list 511 and a G1_list 513 in an old PDL 510 in the DMAof the C−2 disc 207 are maintained in a P_list 531 and a G1_list 533 ina new PDL 530 in the DMA of the C−2′ disc 211, respectively, and aG2_list 515 in the old PDL 510 and the defect information in an old SDL520 are registered in a G2_list 535 in the new PDL 530. In addition, itis checked whether the un-used area is set to “FFh.”

As shown in FIG. 4D, check items for verifying the SDL structure includean SDL identifier, an SDL update counter, a start sector number of asecondary spare area (SSA), a total number of logical sectors, a DDS/PDLupdate counter, a spare area full flag, a number of entries in SDL, anintegrity of SDL entries, an un-used area, reserved areas, etc.

It is checked whether the SDL identifier is “0002h.” To verify the itemof the corresponding SDL update counter, it is checked whether a value Nindicating the SDL update counter value is a previous value, and whethera value k indicating an increment of the SDL update counter representinga difference in the SDL update counter “N” before and after a test is“1.” To verify the item of the corresponding DDS/PDL update counter, itis checked whether a value M indicating the DDS/PDL update counter valueis a previous value, and whether a value k indicating the increment ofthe DDS/PDL update counter is “1.”

It is checked whether the spare area full flag indicates that thesecondary spare area is not full, and whether the number of entries inSDL is set to “00h,” which is a value usually indicating there is none.Moreover, because the total used area of the SDL is known, if the numberof entries in the SDL is checked, the size of the un-used area of theSDL can be determined. Accordingly, it is checked whether the size ofthe un-used area of the C−2′ disc DMA mirror file 213 is equal to thesize of the un-used area of the SDL, which is known based on the numberof entries in the SDL and it is also checked whether the un-used area isset to “Ffh.” Also, it is checked whether values of all reserved areasare “00h.” This is because the defect information registered in the oldSDL 520 on the C−2 disc 207 is all registered in the G2_list 535 in thenew PDL 530, as shown in FIG. 5, when the drive to be tested 209performs normally the reinitialization with converting SDL into aG2-list without certification. In this case, the number of defects inthe old SDL 520 is set not to exceed the total number of defects whichcan be registered in the old PDL 510. The total number of defects whichcan be registered in the old PDL 510 is the total number of defectswhich can newly be registered in the G2_list 515 in the old PDL 510. Thetotal number of defects is used for considering defect information whichis previously registered in the G2_list 515 in the old PDL 510.

When defects registered in the G2_list 515 in the old PDL 510 anddefects registered in the old SDL 520 on the C−2 disc 207 overflow anarea assigned to the G2_list 535 in the new PDL 530, defects remainingafter the registration in the G2_list 535 are registered in a new SDL540. Accordingly, when the defects overflow the G2_list 535, it needs tobe checked whether the integrity of the SDL entries includes the defectinformation which is registered in the old SDL 520 but is not registeredin the G2-list 535, after conversion to the G2-list. To make theoverflow state occur, the number of defects registered in the old SDL520 should be set to exceed the total number of defects which can beregistered in the old PDL 510.

The verifier 215 verifies whether the drive to be tested 209 normallygenerates or updates DMA of the C−2 disc 207 during the reinitializationwith SDL conversion without certification by comparing the referenceinformation, which is set as shown in FIGS. 4A through 4D, withinformation contained in the C−2′ disc DMA mirror file 213. The verifiedresult is output as the result of testing the drive to be tested 209 inthe mode of reinitialization with SDL conversion without certification.The verified result may be displayed for viewing by the user. For this,the present invention may include a display unit. Therefore, the usercan be informed whether the drive to be tested 209 normally reads theDMA information from a disc and generates or updates the DMA in the modeof reinitialization with SDL conversion and without certification.

In addition, the verifier 215 considers that the above reinitializationmode is erroneous and outputs a corresponding result when it isdetermined that the drive to be tested 209 does not use spare blocks(ECC blocks) on the C−2 disc 207 during the SDL conversion.

FIG. 6 is a flowchart of a verification method according to the presentinvention. The C−2 disc 207 is generated by recording the test referenceDMA mirror file, which has conditions described in FIG. 2, on the blankC−1 disc 201, which has conditions described in FIG. 2, in operation601. Next, in operation 602, the C−2 disc 207 is loaded into the driveto be tested 209, and the reinitialization is performed on the C−2 disc207. During the reinitialization, SDL entries are converted into PDLentries, and the C−2 disc 207 is not certified. Accordingly, the defectinformation in the SDL is registered as the G2-list defect informationin the PDL as described with reference to FIGS. 4A through 4D and FIG.5.

In operation 603, DMA information is read from the C−2′ disc 211, and aC−2′ disc DMA mirror file 213 is generated based on the DMA information.The C−2′ disc DMA mirror file is used as test information. In theoperation 603, part of the DMA mirror file can be extracted as testinformation, as described in FIG. 2. The C−2′ disc DMA mirror file 213is verified in operation 604. The verification is performed usingexpected reference information (or expected values) as shown in FIGS. 4Athrough 4D in the same manner as performed by the verifier 215 describedin FIG. 2. After completing the verification, the result of theverification is output in operation 605 so that the user can estimatethe DMA generation or updating function of the drive to be tested 209.

FIG. 7 shows the drive to be tested 110 having a light source 22 to emitlight, a focusing element 24 to focus the light from the light source ona disc D, and a controller 26 which controls the light source 22. Theverification process described above seeks to verify the properoperation of the controller 26.

As described above, the present invention performs reinitialization withSDL conversion without certification on a C−2 disc, which is generatedusing a blank disc (a C−1 disc) on which no information is recorded, anda test reference DMA mirror file, which is proper for a test environmentincluding all kinds of defect information, in a disc drive (a discrecording and reproducing apparatus). A DMA mirror file, which isobtained after the reinitialization with SDL conversion withoutcertification, is verified to test the disc drive for a DMA generationor updating function, thereby allowing the user to verify the DMAgeneration or updating function of a given disc drive within a shortperiod of time. In addition, according to the present invention, theuser may personally produce the test disc (the C−2 disc), whichsatisfies conditions for converting SDL entries into PDL entries, usingthe test reference DMA mirror file and the blank disc, thereby reducingthe cost by not requiring a manufacturer to produce and provide the testdisc described above. The user can produce the C−2 disc using thereference drive, the DMA mirror file provider, and the C−1 disc.

Although a few preferred embodiments of the present invention have beenshown and described, it would be appreciated by those skilled in the artthat changes may be made in this embodiment without departing from theprinciples and spirit of the invention, the scope of which is defined inthe claims and their equivalents.

What is claimed is:
 1. A method of verifying a defect management area(DMA) information generation or updating function of a recording andreproducing apparatus which records information on or reproducesinformation from a disc with DMA information, the method comprising:performing reinitialization without certification in the recording andreproducing apparatus using a test disc with test reference informationand generating test information from the defect management informationwhich is generated after the reinitialization; and comparing referenceinformation expected from the test reference information with the testinformation and providing the result of verification of the testinformation.
 2. The method of claim 1, wherein the test referenceinformation is a mirror file.
 3. The method of claim 1, wherein the testreference information is a DMA mirror file configured such that aplurality of kinds of defects are included in a primary defect list(PDL).
 4. The method of claim 3, wherein the performing comprisesconverting a secondary defect list (SDL) recorded on the test disc intothe PDL included in the test information.
 5. The method of claim 4,wherein the test information is a mirror file.
 6. The method of claim 5,wherein the comparing comprises checking whether all entries of the SDLare registered in a G2-list of the PDL, in a case where a number ofdefects registered in the SDL does not exceed a total number of entrieswhich can be newly registered in the PDL when defect informationregistered in the SDL included in the test reference information isconverted into defect information registered in the PDL.
 7. The methodof claim 5, wherein the comparing comprises checking whether the SDLincluded in the test information is null.
 8. The method of claim 5,wherein the comparing comprises checking whether defect informationregistered in the SDL are registered in a G2-list of the PDL of the testinformation, end then checking whether defect information that isregistered in the SDL but is not registered in the G2-list is registeredin an SDL of the test information, in a case where a number of defectsregistered in the SDL exceeds a total number of entries which can benewly registered in the PDL when the defect information registered inthe SDL included in the test reference information is converted into thedefect information registered in the PDL.
 9. The method of claim 5,wherein the comparing comprises: verifying a structure of DMA of thetest information; verifying a disc definition structure (DDS) of thetest information; verifying a primary defect list (PDL) structure of thetest information; and verifying a secondary defect list (SDL) structureof the test information.
 10. The method of claim 9, wherein theverifying of the DMA structure comprises checking a DMA error condition,DDS/PDL and SDL update counter and contents of DMA.
 11. The method ofclaim 10, wherein: the checking the DMA error condition compriseschecking whether errors exist in any one of four DMAS, which is the DMAwritten in four positions on the test disc, two of which are located ina lead-in area and two of which are located in a lead-out area on thetest disc; the checking the DDS/PDL update counters comprises checkingwhether the values of the DDS/PDL update counters iii four DDSs and infour SDLs are “previous values,” whether increments of the DDS/PDLupdate counters representing a difference in the DDS/PDL update countersbefore and after the performing of the reinitialization withoutcertification are “1,” and whether the values of the DDS/PDL updatecounters are the same; the checking the SDL update counters compriseschecking whether values of the SDL update counters in the four SDLs are“previous values,” whether increments of the SDL update countersrepresenting a difference in the SDL update counters before and afterthe performing of the reinitialization without certification are “1,”and whether the values of the SDL update counters are the same; and thechecking the contents of the DMA comprises checking whether the contentsof the four DMAs are the same.
 12. The method of claim 9, wherein theverifying of the DDS comprises checking a DDS identifier, a disccertification flag, a DDS/PDL update counter, a number of groups, anumber of tones, a location of a primary spare area, a location of afirst logical sector number and a start logical sector number for eachzone.
 13. The method of claim 12, wherein: the checking the DDSidentifier comprises checking whether the DDS identifier is apredetermined value; the checking the disc certification flag compriseschecking whether a value of a bit indicating in-progress in the disccertification flag is “0b” and whether a value of a bit indicating discmanufacturer certification and a value of a bit indicating usercertification are “1b”; the checking the DDS/PDL update countercomprises checking whether the DDS/PDL update counter value is a“previous value” and whether an increment of the DDS/PDL update counterrepresenting a difference in the DDS/PDL update counter before and afterthe performing of the reinitialization without certification is “1”; thechecking the number of groups comprises checking whether the number ofgroups is a predetermined number; the checking the number of zonescomprises checking whether the number of zones is a predeterminednumber; the checking the location of the primary spare area compriseschecking whether first and last sector numbers of the primary spare areaare predetermined sector numbers, respectively; the checking the logicalsector number comprises checking whether the location of the firstlogical sector number is determined based on a number of defectsregistered in the PDL; and the checking the start logical sector numbercomprises checking whether the start logical sector number for each zoneis determined based on the number of defects registered in the PDL. 14.The method of claim 9, wherein the verifying of the PDL structurecomprises checking a PDL identifier, a number of entries in the PDL andan integrity of the PDL entries.
 15. The method of claim 14, wherein:the checking the PDL identifier comprises checking whether the PDLidentifier is a predetermined value; the checking the number of entriescomprises checking whether the number of entries in the PDL is the sameas the number of defects registered in the PDL; and the checking theintegrity of the PDS entries comprises checking whether the integrity ofthe PDL entries comprises all entries of a P-list, G1-list and aG2-list.
 16. The method of claim 9, wherein the verifying of the SDLstructure comprises checking an SDL identifier, an SDL update counter, astart sector number of a secondary spare area (SSA), a total number oflogical sectors, a DDS/PDL update counter, a spare area full flag, anumber of entries in the SDL, an integrity of the SDL entries, anun-used area, and reserved areas.
 17. The method of claim 16, wherein:the checking the SDL identifier comprises checking whether the SDLidentifier is a predetermined value; the checking the SDL update countercomprises checking whether the SDL update counter value is a “previousvalue” and whether an increment of the SDL update counter representing adifference in the SDL update counter before and after the performing ofthe reinitialization without certification is “1”; the checking theDDS/PDL update counter comprises checking whether the DDS/PDL updatecounter value is a “previous value” and whether an increment of theDDS/PDL update counter representing a difference in the DDS/PDL updatecounter before and after the performing of the reinitialization withoutcertification is “1”; the checking the start sector number and the totalnumber of logical sectors comprises checking whether the start sectornumber of the SSA and the total number of logical sectors are properlyset according to a size of the SSA which is designated by a user; thechecking the spare area full flag, the number of entries of the SDL andthe integrity of the SDL entries comprises checking whether the sparearea full flag indicates that the SSA is not full, whether the number ofentries in the SDL is set to “00h” indicating that no entries exist, andwhether no information on the SDL entries exists; and the checking theun-used area and the reserved areas comprises checking a size of theun-used area of the SDL and whether the un-used area is a predeterminedvalue, and whether the reserved areas are predetermined values.
 18. Themethod of claim 16, wherein: the checking the SDL identifier compriseschecking whether the SDL identifier is a predetermined value; thechecking the SDL update counter comprises checking whether the SDLupdate counter value is a “previous value” and whether an increment ofthe SDL update counter representing a difference in the SDL updatecounter before and after the performing of the reinitialization withoutcertification is “1”; the checking the DDS/PDL update counter compriseschecking whether the DDS/PDL update counter value is a “previous value”and whether an increment of the DDS/PDL update counter representing adifference in the DDS/PDL update counter before and after the performingof the reinitialization without certification is “1”; the checking thestart sector number and the total number of logical sectors compriseschecking whether the start sector number of the SSA and the total numberof logical sectors are properly set according to a size of the SSA whichis designated by a user; the checking the spare area full flag, thenumber of entries of the SDL and the integrity of the SDL entriescomprises checking whether surplus defect information of the SDL isregistered in an SDL of the test information in a case where a number ofdefects in the SDL overflows an area assigned to a G2-list of the PDLduring the SDL conversion when the spare area full flag indicates thatthe SSA is not full; and the checking the un-used area and the reservedareas comprises checking a size of the un-used area of the SDL andwhether the un-used area is a predetermined value, and whether thereserved areas are predetermined values.
 19. The method of claim 4,wherein the comparing comprises outputting the verified result as thereinitialization mode being erroneous in response to determining thatthe recording and reproducing apparatus does not use spare blocks on thetest disc during the conversion of the SDL.
 20. The method of claim 1,wherein the test disc includes detect information on locationssatisfying conditions in which an error readily occurs during theperforming of the reinitialization without certification.
 21. The methodof claim 20, wherein the test disc comprises first and last sectors ofeach zone which are treated as erroneous sectors, and a total number ofavailable sectors in each zone is not a multiple of
 16. 22. The methodof claim 1, further comprising recording the test reference informationon a blank disc to generate the test disc.
 23. The method of claim 22,wherein the recording the test reference information comprises recordingthe test reference information on the blank disc regardless of aphysical condition of the blank disc.
 24. The method of claim 1, furthercomprising displaying the verified result as a result of testing the DMAgeneration or updating function of the recording and reproducingapparatus.
 25. An apparatus for testing a defect management area (DMA)information generation or updating function of a recording andreproducing apparatus which records information on or reproducesinformation from a disc with DMA information, the apparatus comprising:a reference drive generating test information from a DMA of a test discwith test reference information and physical defects after the recordingand reproducing apparatus performs reinitialization withoutcertification on the test disc; and a verifier comparing referenceinformation, which is expected from the test reference information, withthe test information and providing a result of verifying the testinformation.
 26. The apparatus of claim 25, wherein the test referenceinformation is a mirror file.
 27. The apparatus of claim 25, wherein thetest reference information is a DMA mirror file comprising a pluralityof kinds of defects included in a primary defect list (PDL).
 28. Theapparatus of claim 27, wherein the reference drive directly reads thetest information from the test disc which is reinitialized withconversion of a secondary defect list (SDL) into the PDL in therecording and reproducing apparatus.
 29. The apparatus of claim 25,wherein the test information is a mirror file.
 30. The apparatus ofclaim 29, wherein the verifier checks whether all entries of the SDL areregistered in a G2-list of the PDL, in a case where a number of defectsregistered in the SDL does not exceed a total number of entries whichcan be newly registered in the PDL when defect information registered inthe SDL included in the test reference information is converted intodefect information registered in the PDL.
 31. The apparatus of claim 29,wherein the verifier checks whether defect information registered in theSDL are registered in a G2-list of the PDL of the test information, andthen checks whether the defect information that is registered in the SDLbut is not registered in a G2-list is registered in an SDL of the testinformation, in a case where a number of detects registered in the SDLexceeds a total number of entries which can be newly registered in thePDL when defect information registered in the SDL included in the testreference information is converted into defect information registered inthe PDL.
 32. The apparatus of claim 29, wherein the verifier checkswhether the SDL included in the test information is null.
 33. Theapparatus of claim 29, wherein the verifier outputs the verified resultindicating the reinitialization to be erroneous in response todetermining that the recording and reproducing apparatus does not usespare blocks on the test disc during the conversion.
 34. The apparatusof claim 29, wherein the verifier verifies a structure of a DMA, a discdefinition structure (DDS), a primary defect list (PDL) structure and asecondary defect list (SDL) structure in the test information.
 35. Theapparatus of claim 34, wherein the verifier verifies the DMA structureby checking an error condition of the DMA, DDS/PDL and SDL updatecounters and contents of the DMA.
 36. The apparatus of claim 35, whereinto verify the DMA structure, the verifier checks whether errors exist inany one of four DMAs, which is the DMA written in four positions on thetest disc, two of which are located in a lead-in area and two of whichare located in a lead-out area on the test disc, whether values ofDDS/PDL update counters in four DDSs and in four SDLs are “previousvalues,” whether increments of the DDS/PDL update counters representinga difference in the DDS/PDL update counters before and after theperforming of the reinitialization without certification are “1,”whether the values of the DDS/PDL update counters are the same, whethervalues of SDL update counters in the four SDLs are “previous values,”whether the increments of the SDL update counters representing adifference in the SDL update counters before and after the performing ofthe reinitialization without certification are “1,” whether the valuesof the SDL update counters are the same, and whether contents of thefour DMAs are the same.
 37. The apparatus of claim 34, wherein theverifier verifies the DDS by checking a DDS identifier, a disccertification flag, a DDS/PDL update counter, a number of groups, anumber of zones, a location of a primary spare area, a location of afirst logical sector number and a start logical sector number for eachzone.
 38. The apparatus of claim 37, wherein to verify the DDS, theverifier checks the DDS identifier, checks whether a value of a bitindicating in-progress in the disc certification flag is “0b,” whether avalue of a bit indicating disc manufacturer certification and a value ofa bit indicating user certification are “1b,” whether the DDS/PDL updatecounter value is a “previous value” and whether an increment of theDDS/PDL update counter representing a difference in the DDS/PDL updatecounter before and after the performing of the reinitialization withoutcertification is “1,” checks the number of groups, the number of zonesand first and last sector numbers of the primary spare area, and checkswhether the location of the first logical sector number is determinedbased on a number of defects registered in the PDL and whether the startlogical sector number for each zone is determined based on the number ofdefects registered in the PDL.
 39. The apparatus of claim 34, whereinthe verifier verifies the PDL structure by checking a PDL identifier, anumber of entries in the PDL and an integrity of PDL entries.
 40. Theapparatus of claim 39, wherein to verify the PDL structure, the verifierchecks whether the PDL identifier is a predetermined value and checkswhether the number of entries in the PDL is the same as a number ofdefects registered in the PDL and whether the integrity of PDL entriescomprises all entries of a P-list, G1-list and a G2-list.
 41. Theapparatus of claim 34, wherein the verifier verifies the SDL structureby checking an SDL identifier, an SDL update counter, a start sectornumber of a secondary spare area (SSA), a total number of logicalsectors, a DDS/PDL update counter, a spare area full flag, a number ofentries in the SDL, an integrity of the SDL entries, an un-used area,and reserved areas.
 42. The apparatus of claim 41, wherein to verify theSDL structure, the verifier checks the SDL identifier and checks whetherthe SDL update counter value is a “previous value,” whether an incrementof the SDL update counter representing a difference in the SDL updatecounter before and after the performing of the reinitialization withoutcertification is “1,” whether the DDS/PDL update counter value is a“previous value,” whether an increment of the DDS/PDL update counterrepresenting a difference in the DDS/PDL update counter before and afterthe performing of the reinitialization without certification is “1 ,”whether the start sector number of the SSA and the total number oflogical sectors are properly set according to the size of a the SSAwhich is designated by a user, whether the spare area full flagindicates that the SSA is not full, whether the number of entries in theSDL is set to “00h” indicating that no entries exist whether noinformation on the SDL entries exists, a size of the un-used area of theSDL and whether the un-used area is a predetermined value, and whetherthe reserved areas are predetermined values.
 43. The apparatus of claim41, wherein the verifier checks the SDL identifier and checks whetherthe SDL update counter value is a “previous value,” whether an incrementof the SDL update counter is “1,” whether the DDS/PDL update countervalue is a “previous value,” whether an increment of the DDS/PDL updatecounter is “1,” whether the start sector number of the SSA and the totalnumber of logical sectors are properly set according to the size of theSSA which is designated by a user, whether the spare area full flagindicates that the SSA is not full, whether surplus defect informationof the SDL is registered in an SDL of the test information in a casewhere a number of defects in the SDL overflows an area assigned to aG2-list of the PDL during the SDL conversion, a size of the un-used areaof the SDL and whether the un-used area is a predetermined value, andwhether the reserved areas are predetermined values.
 44. The apparatusof claim 25, wherein the reference drive records the test referenceinformation on a blank disc to generate the test disc.
 45. The apparatusof claim 44, wherein the reference drive records the test referenceinformation on the blank disc regardless of a physical condition of theblank disc.
 46. The apparatus of claim 25, wherein the test disccomprises defect information on locations satisfying conditions in whichan error readily occurs, during the reinitialization.
 47. The apparatusof claim 46, wherein the test disc comprises first and last sectors ofeach zone which are treated as erroneous sectors, and a total number ofavailable sectors in each zone is not a multiple of
 16. 48. Theapparatus of claim 25, further comprising a display displaying theverified result as a result of testing the DMA generation or updatingfunction of the recording and reproducing apparatus.
 49. A method ofverifying whether defect management area (DMA) information is properlygenerated or updated in a recording and reproducing apparatus whichrecords or reproduces information on or from an optical disc with theDMA information, the method comprising: setting a test referenceaccording to a reinitialization with SDL conversion withoutcertification test mode; generating test information from the DMAinformation, which is generated or updated by the recording andreproducing apparatus, according to the reinitialization with SDLconversion without certification test mode; and executing a test forverifying the test information using the test reference in thereinitialization with SDL conversion without certification test mode.50. The method of claim 49, wherein the test information is a DMA mirrorfile.
 51. The method of claim 49, wherein the test information isdirectly read from a DMA area on a disc used for a test.
 52. The methodof claim 49, wherein the generating of the test information comprisesrecording pro-fixed contents of a DMA and selecting a DMA mirror file,in which the supplementary spare area is not full.
 53. The method ofclaim 52, further comprising: obtaining a first test disc by formingknown physical defects on a blank disc; and obtaining a second test discby recording pre-fixed contents of a DMA in the first test disc, andrecording a mirror file indicating that the supplementary spare area isnot full in the first test disc, and using the second test disc ingenerating the test information.
 54. The method of claim 53, wherein theexecuting of the test comprises performing the reinitialization with SDLconversion without certification and with SDL list conversion, checkingwhether the DMA information of the second test disc complies with apredetermined DMA structure and whether a P-list and a G1-list aremaintained, and checking a primary defect list (PDL) and a secondarydefect list (SDL) for the SDL list conversion and a start logical sectornumber of each zone of the second test disc.
 55. A method of verifyingwhether detect management area (DMA) information is properly generatedor updated in a recording and reproducing apparatus which records orreproduces information on or from an optical disc with the DMAinformation, the method comprising: generating test information from theDMA information, which is generated or updated by the recording andreproducing apparatus, according to a reinitialization with SDLconversion without certification test mode; and verifying the testinformation using a test reference for verifying the DMA information.56. The method of claim 55, wherein the test information is a DMA mirrorfile.
 57. An apparatus for testing a recording and reproducing apparatuswhich records or reproduces information on or from a recordable andreproducible optical disc with defect management area (DMA) informationto check whether the DMA information is properly generated or updated,the apparatus comprising: a modified drive unit generating testinformation from the generated or updated DMA information of a testdisc, which is obtained after the recording and reproducing apparatusperforms reinitialization with SDL conversion without certification onthe test disc with a DMA mirror file corresponding to thereinitialization with SDL conversion without certification; and averifier comparing the test information with predetermined testinformation corresponding to the reinitialization with SDL conversionwithout certification to verify a test result.
 58. The apparatus ofclaim 57, wherein the test information is a DMA mirror file.
 59. Theapparatus of claim 57, wherein the modified drive unit reads the testinformation from a DMA area on the test disc and provides the testinformation to the verifier.
 60. The apparatus of claim 59, wherein thetest disc is a second test disc on which pro-fixed contents of a DMA arerecorded In a first test disc on which known physical defects are formedon a blank disc, and on which a mirror file that the supplementary sparearea is not full is recorded.
 61. The apparatus of claim 60, wherein theverifier checks whether the DMA information of the second test disccomplies with a predetermined DMA structure and whether a P-list and aG1-list are maintained, and checks a primary defect list (PDL) and asecondary defect list (SDL) for SDL list conversion and a start logicalsector number of each zone of the second test disc.
 62. A method ofverifying whether a recording and reproducing apparatus reads andprocesses defect management area (DMA) information properly, comprising:performing reinitialization with SDL conversion without certification ona test disc containing predetermined defect information using thereproducing and recording apparatus to generate test information; andcomparing the test information with reference test information todetermine a verification of the recording and reproducing apparatus. 63.The method of claim 61, further comprising: making known physicaldefects at predetermined positions in a blank disc, to produce a firsttest disc; obtaining a second test disc by recording pre-fixed contentsof a DMA in the first test disc, and recording a mirror file indicatingthat a supplementary spare area is not full in the first test disc;having the recording and reproducing apparatus perform thereinitialization with SDL conversion without certification on the secondtest disc, to generate a second test disc with the DMA information; andreading only the DMA Information from the second test disc with the DMAinformation using a reference drive, to generate a test DMA mirror fileas the test information; wherein the reference test information is areference DMA mirror file.
 64. The method of claim 63, wherein thecomparing comprises checking whether the DMA information of the secondtest disc complies with a predetermined DMA structure, checking whetherthe DMA information of the second test disc complies with apredetermined DMA structure and whether a P-list and a G1-list aremaintained, and checking a primary defect list (PDL) and a secondarydefect list (SDL) for SDL list conversion and a start logical sectornumber of each zone of the second test disc.
 65. A method of verifyingwhether a recording and reproducing apparatus properly translates andprocesses defect information, the method comprising: preparing a testdisc having known physical defects and a test reference DMA mirror file;generating test information based on having the recording andreproducing apparatus per-farm reinitialization with SDL conversionwithout certification on the test disc; and conducting a verificationtest on the test information.
 66. The method of claim 65, wherein thetest reference DMA mirror file comprises information on defectsconcentrated around a physical sector located where a first logicalsector is supposed to be located.
 67. The method of claim 66, whereinthe test reference DMA mirror file comprises first and last sectors ofeach zone which are treated as erroneous sectors, and defective sectorsare set such that a total of available sectors in each zone is not amultiple of
 16. 68. A method of verifying whether a recording andreproducing apparatus reads and processes defect management area (DMA)information properly, comprising: performing reinitialization with SDLconversion without certification on a test disc known physical defectsand a test reference DMA mirror file using the reproducing and recordingapparatus to generate the DMA information; generating test informationfrom the generated DMA information; and comparing the test informationwith reference test information to determine a verification of therecording and reproducing apparatus.
 69. The method of claim 68, whereinthe test reference DMA mirror file comprises information on defectsconcentrated around a physical sector located where a first logicalsector is supposed to be located.
 70. The method of claim 69, whereinthe test reference DMA mirror file comprises first and last sectors ofeach zone which are treated as erroneous sectors, and defective sectorsare set such that a total of available sectors in each zone is not amultiple of
 16. 71. The method of claim 66, wherein the comparingcomprises checking a structure of a DMA, a disc definition structure(DDS) of the DMA, a primary defect list (PDL) structure and a secondarylist (SDL) structure of the DMA, which form the test information. 72.DMA information which is properly generated by a recording andreproducing apparatus using the process of: performing reinitializationwith SDL conversion without certification on a test disc containingknown physical defects and a test reference DMA mirror file using thereproducing and recording apparatus to generate the DMA information;generating test information from the generated DMA information; andcomparing the test information with reference test information todetermine a verification of the recording and reproducing apparatus. 73.The DMA information of claim 72, wherein the test reference DMA mirrorfile comprises information on defects concentrated around a physicalsector located where a first logical sector is supposed to be located.74. The DMA information of claim 73, wherein the test reference DMAmirror file comprises first and list sectors of each zone which aretreated as erroneous sectors, and defective sectors are set such that atotal of available sectors in each zone is not a multiple of
 16. 75. TheDMA information of claim 72, wherein the comparing comprises checking astructure of a DMA, a disc definition structure (DDS) of the DMA, aprimary defect list (PDL) structure and a secondary list (SDL) structureof the DMA, which form the test information.
 76. A recording andreproducing apparatus verified according to the process of: performingreinitialization with SDL conversion without certification on a testdisc containing known physical defects and a test reference DMA mirrorfile using the reproducing and recording apparatus to generate the DMAinformation; generating test information from the generated DMAinformation; and comparing the test information with reference testinformation to determine a verification of the recording and reproducingapparatus.
 77. The recording and reproducing apparatus of claim 76,wherein the test reference DMA mirror file comprises information ondefects concentrated around a physical sector located where a firstlogical sector is supposed to be located.
 78. The recording andreproducing apparatus of claim 77, wherein the test reference DMA mirrorfile comprises first and last sectors of each zone which are treated aserroneous sectors, and defective sectors are set such that a total ofavailable sectors in each zone is not a multiple of
 16. 79. Therecording and reproducing apparatus of claim 76, wherein the comparingcomprises checking a structure of a DMA, a disc definition structure(DDS) of the DMA, a primary defect list (PDL) structure and a secondarylist (SDL) structure of the DMA, which form the test information.
 80. Arecording and reproducing apparatus verified according to the processof: performing reinitialization with SDL conversion withoutcertification on a test disc containing known physical defects and atest reference DMA mirror file using the reproducing and recordingapparatus to generate the DMA information; and comparing the testinformation with reference test information to determine a verificationof the recording and reproducing apparatus.
 81. The recording andreproducing apparatus of claim 80, wherein the test reference DMA mirrorfile comprises information on defects concentrated around a physicalsector located where a first logical sector is supposed to be located.82. The recording and reproducing apparatus of claim 81, wherein thetest reference DMA mirror file comprises first and last sectors of eachzone which are treated as erroneous sectors, and defective sectors areset such that a total of available sectors in each zone is not amultiple of
 16. 83. The recording and reproducing apparatus of claim 80,wherein the comparing comprises checking a structure of a DMA, a discdefinition structure (DDS) of the DMA, a primary defect list (PDL)structure and a secondary list (SDL) structure of the DMA, which formthe test information.
 84. An apparatus for testing a recording andreproducing apparatus which records or reproduces information on or forma recordable and reproducible optical disc with defect management areainformation to check whether DMA information is properly generated, theapparatus comprising: a modified driver generating test informationbased on the DMA information of a test disc generated by a reproducingdevice performing reinitialization with SDL conversion withoutcertification on the test disc containing known physical defects and atest reference DMA mirror file using the reproducing and recordingapparatus to generate the DMA information; and a verifier comparing thetest information with reference test information to determine averification of the recording and reproducing apparatus.
 85. Theapparatus of claim 84, wherein the modified driver reads only the DMAinformation from the test disc with the DMA information, to generate aDMA mirror file as the test information; wherein the reference testinformation is a reference DMA mirror file.
 86. The apparatus of claim84, wherein the modified driver generates a second test disc byrecording pre-fixed contents of a DMA on a first test disc having knownphysical defects, and recording a test reference DMA mirror fileindicating that the supplementary spare area is not full in the firsttest disc; the recording and reproducing apparatus performs thereinitialization with SDL conversion without certification on the secondtest disc, to generate a second test disc with the DMA information; andthe modified driver reads only the DMA information from the second testdisc with the DMA information, to generate a test DMA mirror file as thetest information; wherein the reference test information is a referenceDMA mirror file.
 87. The apparatus of claim 86, wherein the verifierchecks whether the DMA information of the second test disc complies witha predetermined DMA structure, checks whether the DMA information of thesecond test disc complies with a predetermined DMA structure and whethera P-list and a G1-list are maintained, and checks a primary defect list(PDL) and a secondary defect list (SDL) for SDL list conversion and astart logical sector number of each zone of the second test disc. 88.The apparatus of claim 84, wherein the verifier compares the testinformation and the reference test information by checking a structureof a DMA, a disc definition structure (DDS) of the DMA, a primary defectlist (PDL) structure and a secondary list (SDL) structure of the DMA,which form the test information.
 89. The apparatus of claim 84, whereinthe test reference DMA mirror file comprises information on defectsconcentrated around a physical sector located where a first logicalsector is supposed to be located.
 90. The apparatus of claim 89, whereinthe test reference DMA mirror file comprises first and last sectors ofeach zone which are treated as erroneous sectors, and defective sectorsare set such that a total of available sectors in each zone is not amultiple of
 16. 91. The apparatus of claim 57, further comprising a DMAmirror file provider which provides the reference test information tothe verifier to make the comparison between the test information and thereference test information.
 92. The apparatus of claim 75, furthercomprising a DMA mirror file provider which provides the reference testinformation to the verifier to make the comparison between the DMAmirror file and the reference DMA mirror file.
 93. A method ofmanufacturing a compliant recording and reproducing apparatus,comprising: manufacturing an uncertified recording and reproducingapparatus that updates and generates defect management area (DMA)information; and verifying whether the uncertified recording andreproducing apparatus is compliant with a standard, said verifyingcomprising: performing reinitialization with SDL conversion withoutcertification on a test disc containing predetermined defect informationand test reference DMA information using the recording and reproducingapparatus to generate test information, and comparing the testinformation with reference test information to determine a verificationof the recording and reproducing apparatus, the verification indicatingthat the uncertified recording and reproducing apparatus is compliantwith the standard.
 94. The method of claim 93, wherein the comparingcomprises checking a structure of a DMA, a disc definition structure(DDS) of the DMA, a primary defect list (PDL) structure and a secondarylist (SDL) structure of the DMA, which form the test information.
 95. Adisc recording and reproducing apparatus for recording and reproducinginformation on an optical disc, comprising: a light source to emit alight; a focusing element to focus the light onto the optical disc torecord and reproduce the information; and a controller to control saidlight source, said controller being verified to update and generatedefect management area (DMA) information by performing reinitializationwith SDL conversion without certification on a test disc containingpredetermined defect information and test reference DMA informationusing the recording and reproducing apparatus to generate testinformation, and comparing the test information with reference testinformation to determine the verification of the recording andreproducing apparatus.
 96. The disc recording and reproducing apparatusof claim 95, wherein the comparing comprises checking a structure of aDMA, a disc definition structure (DDS) of the DMA, a primary defect list(PDL) structure and a secondary list (SDL) structure of the DMA, whichform the test information.
 97. A disc recording and reproducingapparatus for recording and reproducing information on an optical disc:a light source to emit a light; a focusing element to focus the lightonto the optical disc for recording and reproducing the information; anda controller to control said light source and to update end generatedefect management area information after performing reinitializationwith SDL conversion without certification on the optical disc so thatthe defect management information is compliant with a standard.
 98. Thedisc recording and reproducing apparatus of claim 97, wherein thecontroller checks a structure of a DMA, a disc definition structure(DDS) of the DMA, a primary defect list (PDL) structure and a secondarylist (SDL) structure of the DMA, which form the test information. 99.The method of claim 13, wherein the verifying of the DDS furthercomprises checking whether remaining reserved areas have a predeterminedvalue.
 100. The method of claim 15, wherein the verifying of the PDLstructure comprises checking whether an un-used area is a predeterminedvalue.
 101. The method of claim 53, wherein executing the test comprisesverifying the test result to be a failure upon determining that therecording and reproducing apparatus does not use spare blocks on thesecond test disc during secondary list (SDL) conversion.
 102. Theapparatus of claim 60, wherein the verifier verifies the test result tobe a failure upon determining that the recording and reproducingapparatus does not use spare blocks on the second test disc duringsecondary list (SDL) conversion.
 103. The apparatus of claim 87, whereinthe verifier verifies the test result to be a failure upon determiningthat the recording and reproducing apparatus does not use spare blockson the second test disc during the secondary list (SDL) conversion.